Kefu=function(id,_top,_right){
	var me=id.charAt?document.getElementById(id):id,d1=document.body,d2=document.documentElement;d1.style.height=d2.style.height='100%';
	me.style.top=_top?_top+'px':0;
	me.style.right=_right+"px";
	me.style.position='absolute';
	setInterval(function(){me.style.top=parseInt(me.style.top)+(Math.max(d1.scrollTop,d2.scrollTop)+_top-parseInt(me.style.top))*0.1+'px'},10+parseInt(Math.random()*20));
	return arguments.callee};
